Clarity Grades
Below are some simplified definitions of the various clarity grades set by the Gemological Institute of America (GIA). For a comparison with other grading systems used in other countries, go to the clarity comparison chart.
Origin of clarity grades and determination of nomenclature
CIBJO. Scan.D.N., GIA, IDC ...
Diamond Clarity Grades
For a Diamond to be considered truly Flawless, both the Internal and External of the Diamond has to be free of Inclusions and Blemishes under a 10x powered microscope.
Clarity grades of diamond in descending order, The American equivalents are I1, I2, I3. In a piquéd stone, the inclusion or inclusions would be visible to the naked eye.
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Clarity grades are largely determined by the collective visual appearance that a stone's inclusions exhibit in relationship to the size and shape of the stone.
Clarity grades use the letters V, S and I. They stand for Very, Small, and Inclusion. Progressing from Flawless, the grades are VVSI1, (Very, Very Small Inclusions One,) VVSI2, VSI1, VSI2, SI1 then SI2.
Clarity grades of I1, I2 and I3 awarded to diamonds with medium and large inclusions visible to the naked eye.
International Diamond Council (IDC)
Formulated by the WFDB, IDMA and CIBJO in 1979 to create universal rules for diamond trade.
For clarity grades F through SI, inclusions (internal flaws) are NOT visible to the naked eye.
When we speak of a diamond's clarity, we are referring to the presence of identifying characteristics on (blemishes) and within (inclusions) the stone.
For diamonds with clarity grades of I1 or lower, even a polish grade of Fair is acceptable, since these diamonds already possess internal inclusions that are visible to the naked eye, making any polish markings less relevant.
Our next category, clarity grades require careful consideration when shopping for a diamond. Clarity grades refer to the number, position and size of inclusions which interrupt the free flow of light in a faceted diamond.
VS-1 : Both VS clarity grades would make for an excellent purchase, especially in a well-cut stone. They are far more common than the first four classifications, and readily obtainable in both fancy and clear colors.
There are eleven clarity grades in the GIA system ranging from Flawless (Fl) to Imperfect 3 (I3).
In a very small percentage of diamonds in the SI range some characteristics may be visible to the unaided eye.
This "corrected weight" is then multiplied by a per carat base price that is based solely on the "corrected weight", color and clarity grades.
Diamond clarity grading scale consists of eleven clarity grades. They are, in order of decreasing quality: FL (Flawless), IF (Internally Flawless), VVS1 and VVS2 (Very Very Slightly Included), VS1 and VS2 (Very Slightly Included), ...
Preset engagement rings typically feature stones of the same color, cut and clarity grades, but allow the shopper to select a particular carat weight.
Diamond, with clarity grades VVS1-VVS2, is always an excellent quality diamond. Whereas you can also buy diamonds with clarity grades VS1-VS2 and SI1-SI2 as imperfections in these grades are not visible to naked eye and you can save huge money.
IF (Internally Flawless) - GIA clarity grades describes a diamond with no internal characteristics at 10x magnification, but which have minor surface blemishes that do not penetrate the stone.
B2C Jewels offers Loose Diamonds with a wide selection of clarity grades to suit your taste and budget.
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P1, P2, P3, Piqué, First, Second, Third Clarity grades of diamond in descending order, The American equivalents are I1, I2, I3. In a piquéd stone, the inclusion or inclusions would be visible to the human eye.
VS1 & VS2 (Very slightly included) - GIA clarity grades describing diamonds with minor inclusions ranging from difficult to see, to somewhat easy to see under magnification and on a white background.
Almost all diamonds have tiny imperfections. Diamonds with few or no imperfections receive the highest clarity grades.
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The cut of a diamond determines its brilliance. Put simply, the better a diamond is cut, the more sparkle it will have.
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Diamond Clarity
Read all about the various diamond clarity grades.
Diamond Carat
The most important characteristic when choosing a diamond.
The following is the GIA clarity scale, along with corresponding definitions for different clarity grades, which is very commonly used in the United States:
DIAMOND CLARITY SCALE
FL ...
25 carats to 1 carat, with clarity grades from IF to SI. Apollo Diamond's cut stones are available in round brilliant, emerald, princess, and rose cuts, and each cut stone is laser inscribed with the Apollo company logo and serial number.
over-graded Due to lack of knowledge or ethic, many dealers assign higher color and clarity grades to their diamonds, which gives the illusion of higher value.
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The following scale, developed by the Gemological Institute of America (GIA) and commonly used in the United States, contains definitions for different clarity grades.
The term grade is used to describe the amount of, or absence of, inclusions within a diamond or other gemstone. A diamond's clarity grading scale consists of eleven clarity grades.
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GIA uses 11 clarity grades ranging from "Flawless, VVS (Very, Very, Small), VS (Very Small), SI (Slightly Included), to I (Included). Generally clarity characteristics cannot be seen to the unaided eye until reaching the lower SI to I grades.
The following table will explain the clarity grades used by the GIA. Also included is an example of approximate loose-diamond pricing based on an H-color, 1-carat diamond which illustrates the extremes in value simply based on clarity.
Different listings for the color and clarity grades have surfaced for the pair of diamonds.
 See also: Clarity grade, Clarity, Diamond, Cut, Color
  
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